seqM: seqM
In rPraat: Interface to Praat

Description Usage Arguments Details Value Comparison See Also Examples

Matlab-like behaviour of colon operator or linspace for creating sequences, for-loop friendly.

1	seqM(from = NA, to = NA, by = NA, length.out = NA)

`from`	starting value of the sequence (the first number)
`to`	end value of the sequence (the last number or the boundary number)
`by`	increment of the sequence (if specified, do not use the `length.out` parameter). If both `by` and `length.out` are not specified, then `by = +1`.
`length.out`	desired length of the sequence (if specified, do not use the `by` parameter)

Like seq() but with Matlab-like behavior ([: operator] with by or [linspace] with length.out).

If I create a for-loop, I would like to get an empty vector for 3:1 (I want a default step +1) and also an empty vector for seq(3, 1, by = 1) (not an error). This is solved by this seqM function.

returns a vector of type "integer" or "double"

R: seqM		Matlab		R: seq
seqM(1, 3)	[1] 1 2 3	1:3	the same	the same
seqM(1, 3, by=.8)	[1] 1.0 1.8 2.6	1:.8:3	the same	the same
seqM(1, 3, by=5)	[1] 1	1:5:3	the same	the same
seqM(3, 1)	integer(0)	3:1	the same	[1] 3 2 1
seqM(3, 1, by=+1)	integer(0)	3:1:1	the same	Error: wrong 'by'
seqM(3, 1, by=-1)	[1] 3 2 1	3:-1:1	the same	the same
seqM(3, 1, by=-3)	[1] 3	3:-3:1	the same	the same
seqM(1, 3, len=5)	[1] 1.0 1.5 2.0 2.5 3.0	linspace(1,3,5)	the same	the same
seqM(1, 3, len=3)	[1] 1 2 3	linspace(1,3,3)	the same	the same
seqM(1, 3, len=2)	[1] 1 3	linspace(1,3,2)	the same	the same
seqM(1, 3, len=1)	[1] 3	linspace(1,3,1)	the same	[1] 1
seqM(1, 3, len=0)	integer(0) + warning	linspace(1,3,0)	the same without warning	the same without warning
seqM(3, 1, len=3)	[1] 3 2 1	linspace(3,1,3)	the same	the same

round2, isNum, isInt, ifft.

seqM(1, 3)
seqM(1, 3, by=.8)
seqM(1, 3, by=5)
seqM(3, 1)
seqM(3, 1, by=+1)
seqM(3, 1, by=-1)
seqM(3, 1, by=-3)
seqM(1, 3, len=5)
seqM(1, 3, len=3)
seqM(1, 3, len=2)
seqM(1, 3, len=1)
seqM(1, 3, len=0)
seqM(3, 1, len=3)